Environmental and Water Resource Engineering, Indian Institute of Technology, Madras, Tamil Nadu, India.
Department of Civil Engineering, Bannari Amman Institute of Technology, Sathyamangalam, Erode, India.
J Environ Manage. 2019 Jan 15;230:151-158. doi: 10.1016/j.jenvman.2018.08.071. Epub 2018 Oct 1.
In this study, we have explored the possibility of using an industrial waste for remediation of heavy fuel oil contaminated soil. Microwave (MW) heating in the presence of spent graphite (SG) from an auto forging industry has been used for the remediation. The physico-chemical characterization of SG and contaminated soil were done. Microwave remediation experiments were conducted in a lab scale unit and the effect of different parameters like microwave power, susceptor loading and treatment time were studied and optimized. The contaminated and decontaminated soils were analysed using GC-MS for total petroleum hydrocarbons (TPH), Total Organic Carbon and CHNS analyzers. Batch experiments of soil remediation showed that the TPH removal efficiencies (%) of 41.25, 87.77 and 91.18 at 300, 450 and 600 W respectively at SG concentration of 2.5 (wt. %) for a reaction time of 60 min. The addition of SG as susceptor enhanced the desorption of long chain hydrocarbons (C12-C29) present in the soil. Desorption of hydrocarbons from the soil fits well with first order kinetic model. This study successfully demonstrated the reuse of spent graphite (a lubricant waste) recovered from metal forging operations for remediating the fuel oil contaminated soil.
在这项研究中，我们探索了利用工业废物修复重质燃料油污染土壤的可能性。采用微波（MW）加热法，在自动锻造工业的废石墨（SG）存在的情况下，对污染土壤进行修复。对 SG 和污染土壤的理化特性进行了研究。在实验室规模的设备中进行了微波修复实验，研究并优化了不同参数（如微波功率、感应体负载和处理时间）的影响。使用 GC-MS 对受污染和去污土壤进行总石油烃（TPH）、总有机碳和 CHNS 分析器分析。土壤修复的批量实验表明，在 SG 浓度为 2.5（wt.%）、反应时间为 60 分钟的条件下，分别在 300、450 和 600 W 下，TPH 的去除效率（%）为 41.25、87.77 和 91.18。作为感应体添加 SG 增强了土壤中存在的长链烃（C12-C29）的解吸。从土壤中解吸的烃类符合一级动力学模型。这项研究成功地证明了从金属锻造操作中回收的废石墨（一种润滑剂废物）可用于修复受燃料油污染的土壤。
